31031390031 has 8 divisors (see below), whose sum is σ = 41380886064. Its totient is φ = 20684743680.

The previous prime is 31031390003. The next prime is 31031390041. The reversal of 31031390031 is 13009313013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31031390031 - 2⁷ = 31031389903 is a prime.

It is a super-2 number, since 2×31031390031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31031389983 and 31031390010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031390041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686880 + ... + 730661.

It is an arithmetic number, because the mean of its divisors is an integer number (5172610758).

Almost surely, 2^31031390031 is an apocalyptic number.

31031390031 is a deficient number, since it is larger than the sum of its proper divisors (10349496033).

31031390031 is a wasteful number, since it uses less digits than its factorization.

31031390031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424841.

The product of its (nonzero) digits is 729, while the sum is 24.

The spelling of 31031390031 in words is "thirty-one billion, thirty-one million, three hundred ninety thousand, thirty-one".